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Finding the Fourth Proportional to 1,034.47, 1,551.69 and 385.18

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Solution

The fourth proportional to 1,034.47, 1,551.69 and 385.18 is: 577.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.47 : 1,551.69 = 385.18 : x
  2. Step 2: Convert to fraction form
    1,034.47/1,551.69 = 385.18/x
  3. Step 3: Cross multiply
    1,034.47x = 1,551.69 × 385.18
  4. Step 4: Simplify right side
    1,034.47x = 597,679.95
  5. Step 5: Solve for x
    x = 597,679.95/1,034.47
  6. Step 6: Final answer
    x = 577.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.